1 //===- llvm/lib/Target/X86/X86CallLowering.h - Call lowering ----*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 /// \file 10 /// This file describes how to lower LLVM calls to machine code calls. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_X86_X86CALLLOWERING_H 15 #define LLVM_LIB_TARGET_X86_X86CALLLOWERING_H 16 17 #include "llvm/ADT/ArrayRef.h" 18 #include "llvm/CodeGen/GlobalISel/CallLowering.h" 19 #include <functional> 20 21 namespace llvm { 22 23 class DataLayout; 24 class MachineRegisterInfo; 25 class X86TargetLowering; 26 27 class X86CallLowering : public CallLowering { 28 public: 29 X86CallLowering(const X86TargetLowering &TLI); 30 31 bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val, 32 ArrayRef<Register> VRegs) const override; 33 34 bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F, 35 ArrayRef<ArrayRef<Register>> VRegs) const override; 36 37 bool lowerCall(MachineIRBuilder &MIRBuilder, 38 CallLoweringInfo &Info) const override; 39 40 private: 41 /// A function of this type is used to perform value split action. 42 using SplitArgTy = std::function<void(ArrayRef<Register>)>; 43 44 bool splitToValueTypes(const ArgInfo &OrigArgInfo, 45 SmallVectorImpl<ArgInfo> &SplitArgs, 46 const DataLayout &DL, MachineRegisterInfo &MRI, 47 SplitArgTy SplitArg) const; 48 }; 49 50 } // end namespace llvm 51 52 #endif // LLVM_LIB_TARGET_X86_X86CALLLOWERING_H 53